Chapter 5. Extension Points

In this chapter, we will introduce and explore the theory and design concepts used while developing Jenkins plugins. We will cover the high-level concepts here with some generic examples as a preparation for the next two chapters where we will see how to implement these ideas for real.

In this chapter, we will take a look at the following design patterns:

  • Interfaces
  • Abstract classes
  • Singletons

Also, we will review several important design concepts:

  • Design by contract
  • Extension points
  • Creating extensions
  • Annotations

A brief history of Jenkins plugins

There are thousands of plugins available for Jenkins, and they cover a vast range of tasks and provide a wealth of valuable resources for the community that uses and works with Jenkins. ...

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